连接在蒸汽机上的旋转式发动机使轴承转动，机器得以驱动，从而使得利用蒸汽动力纺线和织布的工厂出现。
A rotary engine attached to the steam engine enabled shafts to be turned and machines to be driven, resulting in mills using steam power to spin and weave cotton.
只要我这样使力，旋转的角动量就是想要，水平的转动。
And as long as I torque it like this, that spin angular momentum wants to go around in the horizontal plane.
电场使旋转器产生了扭矩，这个系统就更易顺时针转动。
An electrical field was then used to apply torque to the rotor, making it harder for the system to spin anticlockwise than clockwise.
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